Radial Marker Creation - Math Problem

[Kingsley1997 39]

So I'm building a function that generates grid markers around a center and radius. The script I have so far is the following, however it creates a cross on the map like "+" since I don't know how to do it in a circle. Any mathematicians know how to do this?

private ["_center","_radius"];

_center = _this select 0;
_radius = _this select 1;
_gridSize = 50;

for "_i" from 1 to (_radius / _gridSize) do {
	_top = [_center select 0, (_center select 1) + _gridSize * _i];
	_bottom = [_center select 0, (_center select 1) - _gridSize * _i];
	_left = [(_center select 0) - _gridSize * _i, _center select 1];
	_right = [(_center select 0) + _gridSize * _i, _center select 1];

	{
		_px = floor ((_x select 0) / 100);
		_py = floor ((_x select 1) / 100);
		_name = format ["grid_%1_%2", _px, _py];

		createMarker[_name, [(_px * 100) + 50, (_py * 100) + 50, 0]];
		_name setMarkerShape "RECTANGLE";
		_name setMarkerSize [50,50];
		_name setMarkerColor "ColorBlue"; // Need correct colour
		_name setMarkerAlpha 1;
	} forEach [_top, _bottom, _left, _right];
};

[austin_medic 109]

I suck at math but I gutted a BIS function that did that exactly, and got this (it was  the VRBorders function I believe, and the physical objects it spawned were inadequate so I made my own function out of it with markers instead of objects):

//private ["_pos1", "_unit","_rds", "_steps", "_radStep", "_pos2", "_wall", "_ret"];
_pos1 = [_this,0,position player,[[]]] call BIS_fnc_param;
_rds = [_this,1,700,[0]] call BIS_fnc_param;
_unit = [_this,2,objNull,[objNull]] call BIS_fnc_param;
_ret = [];

_steps = floor ((2 * pi * _rds) / 40);
_radStep = 360 / _steps;

for [{_i = 0}, {_i < 360}, {_i = _i + _radStep}] do {
	//for [{_x = 0}, {_x <= 300}, {_x = _x + 100}] do {
	for [{_x = 0}, {_x <= 0}, {_x = _x + 100}] do {
		_pos2 = [_pos1, _rds, _i] call BIS_fnc_relPos;
		_gib = round(random 500000);
		_text = format["%1_%2",name _unit,_gib];
		_wall = createMarker[_text,_pos2];
		_wall setMarkerShape "ICON";
		_wall setMarkerType "mil_dot";
		_ret set[count _ret,_wall];
	};
};
_ret;

the _unit var is probably moot for your purposes and it creates markers around the center position using the radius, so it'll need some tweaks

[Kingsley1997 39]

I suck at math but I gutted a BIS function that did that exactly, and got this (it was  the VRBorders function I believe, and the physical objects it spawned were inadequate so I made my own function out of it with markers instead of objects):

//private ["_pos1", "_unit","_rds", "_steps", "_radStep", "_pos2", "_wall", "_ret"];
_pos1 = [_this,0,position player,[[]]] call BIS_fnc_param;
_rds = [_this,1,700,[0]] call BIS_fnc_param;
_unit = [_this,2,objNull,[objNull]] call BIS_fnc_param;
_ret = [];

_steps = floor ((2 * pi * _rds) / 40);
_radStep = 360 / _steps;

for [{_i = 0}, {_i < 360}, {_i = _i + _radStep}] do {
	//for [{_x = 0}, {_x <= 300}, {_x = _x + 100}] do {
	for [{_x = 0}, {_x <= 0}, {_x = _x + 100}] do {
		_pos2 = [_pos1, _rds, _i] call BIS_fnc_relPos;
		_gib = round(random 500000);
		_text = format["%1_%2",name _unit,_gib];
		_wall = createMarker[_text,_pos2];
		_wall setMarkerShape "ICON";
		_wall setMarkerType "mil_dot";
		_ret set[count _ret,_wall];
	};
};
_ret;

the _unit var is probably moot for your purposes and it creates markers around the center position using the radius, so it'll need some tweaks

Wow thank you very much! :D I'll see how this goes

[Kingsley1997 39]

Got it working, script below:

private ["_center", "_radius","_steps", "_radStep", "_pos", "_text", "_block"];

_center = param [0, (position player)];
_radius = param [1, 500];

for [{_r = _radius}, {_r > 0}, {_r = _r - 100}] do {
	_steps = floor ((2 * pi * _r) / 50); // 40
	_radStep = 360 / _steps;

	for [{_i = 0}, {_i < 360}, {_i = _i + _radStep}] do {
		for [{_x = 0}, {_x <= 0}, {_x = _x + 100}] do {
			_pos = [_center, _r, _i] call BIS_fnc_relPos;
			_px = floor ((_pos select 0) / 100);
			_py = floor ((_pos select 1) / 100);
			_text = format ["Grid_%1_%2", _px, _py];
			_block = createMarker[_text, [(_px * 100) + 50, (_py * 100) + 50, 0]];
			_block setMarkerShape "RECTANGLE";
			_block setMarkerSize [50, 50];
			_block setMarkerColor "ColorUNKNOWN"; // Need correct colour
			_block setMarkerAlpha 0.5;
		};
	};
};